Turkish security researcher Ibrahim Balic says he reported a Developer Center security vulnerability hours before Apple shut down its developer Web site. The vulnerability enabled Balic to access the email addresses and real names (but not passwords) of more than 100,000 users. Balic told 9To5Mac that he promptly reported the vulnerability to Apple and plans to delete the information he collected. follow link
Go Back and Forth Fast in Preview
If you're reading a PDF in Apple's Preview software, and you follow a bookmark or an internal link to move around within the PDF, you can quickly return to where you were by pressing the keyboard shortcut Command-[ (that's Command-Left Bracket). Or, you can choose Go > Back.
The command works iteratively, so you can go back to just the previously viewed page or if you issue the command again, to the page before that, and so on. There's also an equivalent Go > Forward (Command-]).
Researcher May Have Caused Apple Developer Center Shutdown